🏷️ Basic Information Identification Make: Cadillac Model: STS Model Years Covered: 2004, 2005, 2006, 2007 Generation Model Generation: Second Generation (2005-2012), with specific focus on early models of this generation Codes Platform: GM Sigma Platform 👋 Introduction Market Position Vehicle Segment: Luxury Sedan Target Audience: Owners seeking to perform maintenance and repairs themselves, independent repair shops, DIY enthusiasts Competitive Analysis Competitors: BMW 5 Series, Mercedes-Benz E-Class, Audi A6, Lexus GS Key Features Manual Advantage: Provides the same detailed information used by dealership technicians, offering precise repair procedures and specifications. Digital Format Benefit: Easy to navigate, search, print specific sections, and store digitally, avoiding physical wear and tear. 📋 Manual Details Coverage Areas Primary Coverage: Complete Workshop Service and Repair Secondary Coverage: Maintenance, Diagnostics, Troubleshooting, Overhaul, Wiring Schematics, Specifications Page Count Estimated Page Count: Likely over 2000 pages (typical for comprehensive factory workshop manuals) Manual Type Type: Factory Service Manual (FSM) / Workshop Manual Language Language: English Format Digital Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine, Control System, Fuel Service, Emission Control, Intake/Exhaust/Cooling, Lube, Ignition, Starting/Charging, Automatic Transmission, Manual Transmission, Transfer Case, Propeller Shaft, Drive Shaft, Differential, Axles Chassis: Suspension, Tire & Wheel, Brake Control, Brakes, Parking Brake, Steering Column, Power Steering Body And Electrical: Air Conditioning, Supplemental Restraint System (SRS), Seat Belts, Engine Immobilizer, Cruise Control, Wiper & Washer, Door Locks, Meter/Audio/Visual, Horn, Windshield/Glass/Mirrors, Instrument Panel, Seats, Engine Hood/Doors, Exterior & Interior Trim, Electrical Systems, Multiplex/CAN Communication Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspections/replacement Diagnostic Procedures: Troubleshooting guides, diagnostic trouble codes (DTCs), circuit testing, component testing Repair And Overhaul: Engine mechanical repairs, transmission service and overhaul, brake system repairs, suspension component replacement, electrical component repair/replacement Component Replacement: Detailed instructions for replacing virtually all mechanical and electrical components Technical Depth Depth: Factory-level detail, including step-by-step instructions, torque specifications, diagnostic flowcharts, and wiring diagrams 📊 Manual Specifications File Format Compatibility: Windows and Mac OS Required Software: Adobe PDF Reader, Winzip (or equivalent extraction utility) Print Quality Printability: Fully printable, allowing users to print specific pages or entire sections Image Resolution: High resolution for clear illustrations, diagrams, and schematics, with zoom capability Binding Type Binding Type: Digital PDF (no physical binding) Paper Type Paper Type: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Options: Northstar V8 (4.6L), naturally aspirated; Luxury Performance variants may include a supercharged option (check specific model year) Performance Horsepower Range: Approximately 275-320 hp (naturally aspirated), higher for supercharged variants Torque Range: Approximately 295-315 lb-ft (naturally aspirated), higher for supercharged variants Fuel System Fuel Delivery: Sequential Port Fuel Injection (SFI) Engine Code Northstar 4.6L V8: L37 (for performance applications), LD8 (for standard applications) 🔧 Transmission Standard Transmission Type: 4-speed automatic (e.g., 4T80-E) for early models, potentially transitioning to 6-speed automatic (e.g., 6T80) for later models within this range. Optional Transmission Type: All-Wheel Drive (AWD) often paired with automatic transmissions. Features Torque Converter Lockup: Variable, providing improved fuel economy. 📐 Dimensions Exterior Length: Approximately 199.8 inches Width: Approximately 72.5 inches Height: Approximately 57.5 inches Weights Curb Weight: Approximately 3,800 - 4,100 lbs depending on powertrain and features. Gross Vehicle Weight Rating: Typically around 5,000 lbs. 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (for driver and passenger, for applicable models/tests) IIHS Side Impact: Good (for applicable models/tests) Active Features Stability Control: StabiliTrak (Electronic Stability Control) Traction Control: Traction Control System (TCS) Braking System: Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD) Passive Features Airbags: Frontal airbags, side-impact airbags, available side curtain airbags Seat Belts: 3-point front and rear seat belts with pretensioners and load limiters 💡 Technology Features Infotainment Navigation System: Optional DVD-based or hard-drive-based navigation system with touchscreen interface. Audio System: Bose premium audio system with multiple speakers and CD player, potentially with MP3 capability. Driver Assistance Parking Assist: Optional rear parking assist sensors. Adaptive Cruise Control: Available on some models, maintaining a set distance from the vehicle ahead. Connectivity Onstar: Available OnStar telematics system for emergency services, diagnostics, and hands-free communication. Comfort Features Heated Cooled Seats: Available heated and ventilated front seats. Remote Start: Standard on many models, allowing remote engine start. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 5,000 - 7,500 miles or 6 months, depending on driving conditions and oil type used (refer to manual for specific recommendations like Dexos or equivalent). Coolant Flush: Every 50,000 - 100,000 miles or 5 years (consult manual for specific coolant type like Dex-Cool). Spark Plug Replacement: Typically around 100,000 miles for iridium-tipped plugs. Fluid Specifications Engine Oil: SAE 5W-30 synthetic recommended for Northstar engines (API certified). Transmission Fluid: Dexron VI (for 6-speed automatic), Dexron III H or equivalent (for 4-speed automatic) - consult manual for exact specification. Coolant: GM P/N 12346290 (Dex-Cool), a 50/50 mix of coolant and distilled water. Known Issues Northstar Head Gaskets: Early...